• UF Sparse Matrix Collection
  • Matrix group: Gleich
  • Click here for a description of the Gleich group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Gleich/wikipedia-20051105
  • Description: Wikipedia pages, A(i,j)=1 if page i links to page j (Nov 11, 2005)
  • download as a MATLAB mat-file, file size: 55 MB. Use UFget(1843) or UFget('Gleich/wikipedia-20051105') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Gleich/wikipedia-20051105

    scc of Gleich/wikipedia-20051105

    Gleich/wikipedia-20051105 graph

    Matrix properties
    number of rows1,634,989
    number of columns1,634,989
    nonzeros19,753,078
    structural full rank?no
    structural rank927,611
    # of blocks from dmperm266,725
    # strongly connected comp.528,698
    explicit zero entries0
    nonzero pattern symmetry 12%
    numeric value symmetry 12%
    typebinary
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorD. Gleich
    editorT. Davis
    date2005
    kinddirected graph
    2D/3D problem?no

    Notes:

    For nodenames, see http://www.cise.ufl.edu/research/sparse/aux/Gleich
Pages outside the "Main", "Category" and "Portal" namespace excluded.

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))3.933940e+10 2.433557e+10
    Cholesky flop count7.3e+15 2.6e+15
    nnz(L+U), no partial pivoting7.867716e+10 4.866951e+10
    nnz(V) for QR, upper bound nnz(L) for LU2.641732e+11 -
    nnz(R) for QR, upper bound nnz(U) for LU1.616066e+11 -

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.